16V Compression Test

["Bill Scarince" <Bill.Scarince@tenneco-automotive.com>]

As I'm preparing to pull the stock engine out of my '88 16V,
I thought I'd get some baseline data on the compression.
The block that's coming out is, as far as I know, the original
stock unit with about 95K miles on it.  Bentley sez that for the
PL block one should expect 145-189 for new engines, a min. of
109, and a max. range of 44 psi.

I conducted the test as Bentley describes, ie warm engine,
throttle wide-open, cranked 4-5 revs./until pressure no longer increases.
Here're the results:

Cyl.        Result
1            190
2            185
3            210
4            210

What I don't understand is why the numbers are so high on #3 and #4.
 I've never seen compression go *up* (except during break-in).  I just bought
this car, so I don't know it's history.  Could these readings simply be within
spec. tolerance?

Lemme know what ya'll think.

Bill



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